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Sensor Technologies for Seismic Monitoring

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Sensing and Imaging".

Deadline for manuscript submissions: 20 January 2025 | Viewed by 3412

Special Issue Editors


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Guest Editor
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
Interests: seismic monitoring instruments and methods

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Guest Editor
Institute of Seimiconductors, Chinese Academy of Sciences, Beijing 100083, China
Interests: fiber optic sensor technology; optoelectronic sensor and application
School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Interests: fiber-optic sensors and applications
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
School of Geosciences, China University of Petroleum (Huadong), Qingdao 266580, China
Interests: geophysics of oil and gas reservoirs; seismic wave propagation in viscoelastic media

Special Issue Information

Dear Colleagues,

Recently, we have seen a growing interest in seismic monitoring, which safeguards human lives through the comprehension of such phenomena. Advances in technology have allowed more and more sophisticated seismic networks to be designed; modern seismic networks based on new sensor technologies can detect a massive number of earthquakes, generating an extremely large dataset for analysis. The application of technology such as ultra-sensitive MEMS-based and interferometric accelerometers, distributed optical fiber sensing (DOFS), and distributed acoustic sensing (DAS) based on fiber optics technology has dramatically improved the seismic monitoring capability. Moreover, there are many geophysical phenomena that we are able to record with seismic networks.

This Special Issue, therefore, aims to highlight advances in sensor technologies for seismic monitoring and data analysis methods. Original research and review articles on advanced techniques of seismic monitoring are welcome.

Prof. Dr. Yibo Wang
Prof. Dr. Wentao Zhang
Dr. Qingwen Liu
Prof. Dr. Danping Cao
Guest Editors

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Keywords

  • seismic sensors
  • seismic monitoring instruments
  • seismic monitoring data analysis methods
  • seismic monitoring applications
  • AI for seismic sensing and monitoring
  • fiber-optic sensors for seismic applications

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Published Papers (3 papers)

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Research

18 pages, 6536 KiB  
Article
Strong Interference Elimination in Seismic Data Using Multivariate Variational Mode Extraction
by Zhichao Yu, Yuyang Tan and Yiran Lv
Sensors 2024, 24(22), 7399; https://doi.org/10.3390/s24227399 - 20 Nov 2024
Viewed by 355
Abstract
Seismic data acquired in the presence of mechanical vibrations or power facilities may be contaminated by strong interferences, significantly decreasing the data signal-to-noise ratio (S/N). Conventional methods, such as the notch filter and time-frequency transform method, are usually inadequate for suppressing non-stationary interference [...] Read more.
Seismic data acquired in the presence of mechanical vibrations or power facilities may be contaminated by strong interferences, significantly decreasing the data signal-to-noise ratio (S/N). Conventional methods, such as the notch filter and time-frequency transform method, are usually inadequate for suppressing non-stationary interference noises, and may distort effective signals if overprocessing. In this study, we propose a method for eliminating mechanical vibration interferences in seismic data. In our method, we extended the variational mode extraction (VME) technique to a multivariate form, called multivariate variational mode extraction (MVME), for synchronous analysis of multitrace seismic data. The interference frequencies are determined via synchrosqueezing-based time-frequency analysis of process recordings; their corresponding modes are extracted and removed from seismic data using MVME with optimal balancing factors. We used synthetic data to investigate the effectiveness of the method and the influence of tuning parameters on processing results, and then applied the method to field datasets. The results have demonstrated that, compared with the conventional methods, the proposed method could effectively suppress the mechanical vibration interferences, improve the S/Ns and enhance polarization analysis of seismic signals. Full article
(This article belongs to the Special Issue Sensor Technologies for Seismic Monitoring)
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13 pages, 4265 KiB  
Communication
Moho Imaging with Fiber Borehole Strainmeters Based on Ambient Noise Autocorrelation
by Guoheng Qi, Wenzhu Huang, Xinpeng Pan, Wentao Zhang and Guanxin Zhang
Sensors 2024, 24(13), 4252; https://doi.org/10.3390/s24134252 - 30 Jun 2024
Viewed by 779
Abstract
Moho tomography is important for studying the deep Earth structure and geodynamics, and fiber borehole strainmeters are broadband, low-noise, and attractive tools for seismic observation. Recently, many studies have shown that fiber optic seismic sensors can be used for subsurface structure imaging based [...] Read more.
Moho tomography is important for studying the deep Earth structure and geodynamics, and fiber borehole strainmeters are broadband, low-noise, and attractive tools for seismic observation. Recently, many studies have shown that fiber optic seismic sensors can be used for subsurface structure imaging based on ambient noise cross-correlation, similar to conventional geophones. However, this array-dependent cross-correlation method is not suitable for fiber borehole strainmeters. Here, we developed a Moho imaging scheme for the characteristics of fiber borehole strainmeters based on ambient noise autocorrelation. S-wave reflection signals were extracted from the ambient noise through a series of processing steps, including phase autocorrelation (PAC), phase-weighted stacking (PWS), etc. Subsequently, the time-to-depth conversion crustal thickness beneath the station was calculated. We applied our scheme to continuous four-component recordings from four fiber borehole strainmeters in Lu’an, Anhui Province, China. The obtained Moho depth was consistent with the previous research results. Our work shows that this method is suitable for Moho imaging with fiber borehole strainmeters without relying on the number of stations. Full article
(This article belongs to the Special Issue Sensor Technologies for Seismic Monitoring)
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27 pages, 20869 KiB  
Article
Seismic Monitoring of a Deep Geothermal Field in Munich (Germany) Using Borehole Distributed Acoustic Sensing
by Jérôme Azzola and Emmanuel Gaucher
Sensors 2024, 24(10), 3061; https://doi.org/10.3390/s24103061 - 11 May 2024
Viewed by 1260
Abstract
Geothermal energy exploitation in urban areas necessitates robust real-time seismic monitoring for risk mitigation. While surface-based seismic networks are valuable, they are sensitive to anthropogenic noise. This study investigates the capabilities of borehole Distributed Acoustic Sensing (DAS) for local seismic monitoring of a [...] Read more.
Geothermal energy exploitation in urban areas necessitates robust real-time seismic monitoring for risk mitigation. While surface-based seismic networks are valuable, they are sensitive to anthropogenic noise. This study investigates the capabilities of borehole Distributed Acoustic Sensing (DAS) for local seismic monitoring of a geothermal field located in Munich, Germany. We leverage the operator’s cloud infrastructure for DAS data management and processing. We introduce a comprehensive workflow for the automated processing of DAS data, including seismic event detection, onset time picking, and event characterization. The latter includes the determination of the event hypocenter, origin time, seismic moment, and stress drop. Waveform-based parameters are obtained after the automatic conversion of the DAS strain-rate to acceleration. We present the results of a 6-month monitoring period that demonstrates the capabilities of the proposed monitoring set-up, from the management of DAS data volumes to the establishment of an event catalog. The comparison of the results with seismometer data shows that the phase and amplitude of DAS data can be reliably used for seismic processing. This emphasizes the potential of improving seismic monitoring capabilities with hybrid networks, combining surface and downhole seismometers with borehole DAS. The inherent high-density array configuration of borehole DAS proves particularly advantageous in urban and operational environments. This study stresses that realistic prior knowledge of the seismic velocity model remains essential to prevent a large number of DAS sensing points from biasing results and interpretation. This study suggests the potential for a gradual extension of the network as geothermal exploitation progresses and new wells are equipped, owing to the scalability of the described monitoring system. Full article
(This article belongs to the Special Issue Sensor Technologies for Seismic Monitoring)
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